front: shortcode that actually uses event logos

Signed-off-by: pierre santamaria <[email protected]>

Author: Pivouane

content/_index.en.html

@@ -4,7 +4,7 @@
 +++
 
 {{< blocks/cover title="" image_anchor="top" height="full" color="black">}}
-	<img class="main-logo" src="/images/logo/logo-osrd-color-white.svg">
+	{{< event-logo >}}
 	<h2 class="mb-5 font-weight-normal main-title">Open Source Railway Designer</h2>
 	<div class="mx-auto mt-3">
 		<a class="btn btn-lg btn-primary mx-2 mb-4" href="{{< relref "/about">}}">

content/_index.fr.html

@@ -4,7 +4,7 @@
 +++
 
 {{< blocks/cover title="" image_anchor="top" height="full" color="black">}}
-	<img class="main-logo" src="/images/logo/logo-osrd-color-white.svg">
+	{{< event-logo >}}
 	<h2 class="mb-5 font-weight-normal main-title">Open Source Railway Designer</h2>
 	<div class="mx-auto mt-3">
 		<a class="btn btn-lg btn-primary mx-2 mb-4" href="{{< relref "/about">}}">

data/events.yaml

@@ -0,0 +1,15 @@
+- name: "Xmas"
+  start_month: 12
+  start_day: 1
+  end_month: 1
+  end_day: 1
+  logo: "/images/logo/events/xmas-logo-osrd-color-white.svg"
+  crosses_year: true
+
+- name: "Pride"
+  start_month: 6
+  start_day: 1
+  end_month: 6
+  end_day: 30
+  logo: "/images/logo/events/proud-logo-osrd-color-white.svg"
+  crosses_year: false

layouts/shortcodes/event-logo.html

@@ -0,0 +1,39 @@
+{{ $currentMonth := now.Month }}
+{{ $currentDay := now.Day }}
+{{ $events := site.Data.events }}
+{{ $logoPath := "/images/logo/logo-osrd-color-white.svg" }}
+{{ $logoAlt := "OSRD Logo" }}
+
+{{ range $events }}
+  {{ $isInPeriod := false }}
+
+  {{ if .crosses_year }}
+    {{/* Case in which the event period crosses the end of the year and we need to check more than just months */}}
+    {{ if or (and (eq $currentMonth .start_month) (ge $currentDay .start_day)) (and (eq $currentMonth .end_month) (le $currentDay .end_day)) (gt $currentMonth .start_month) (lt $currentMonth .end_month) }}
+      {{ $isInPeriod = true }}
+    {{ end }}
+  {{ else }}
+    {{/* Normal case */}}
+    {{ if and (ge $currentMonth .start_month) (le $currentMonth .end_month) }}
+      {{ if eq $currentMonth .start_month }}
+        {{ if ge $currentDay .start_day }}
+          {{ $isInPeriod = true }}
+        {{ end }}
+      {{ else if eq $currentMonth .end_month }}
+        {{ if le $currentDay .end_day }}
+          {{ $isInPeriod = true }}
+        {{ end }}
+      {{ else }}
+        {{ $isInPeriod = true }}
+      {{ end }}
+    {{ end }}
+  {{ end }}
+
+  {{ if $isInPeriod }}
+    {{ $logoPath = .logo }}
+    {{ $logoAlt = printf "%s %s" .name $logoAlt }}
+    {{ break }}
+  {{ end }}
+{{ end }}
+
+<img class="main-logo" src="{{ $logoPath }}" alt="{{ $logoAlt }}" />